You never know what will happen at the MTV VMA's and this year certainly did not disappoint! Lady Gaga opened the show and had everyone shocked when she ripped off her clothes and danced around in a thong! Miley also had jaws dropped with her twerking and nude latex underwear! Taylor Swift brought some drama to the show when she mouthed a profanity to Selena Gomez while One Direction was on stage. Still bitter Taylor? And the best moment of the night was Justin Timberlake's amazing performance! We still can't believe NSync reunited on stage with him! Check out all the biggest moments here!